Django-SpamBayes includes a few utility apps for Django that offer an easy to
use interface to the SpamBayes statistical anti-spam filter allowing filtering
and moderation (with training) of comments, contact forms and other publicly
submitted data.

Currently, two applications are available: DjangoBayes, which wraps the Django
model and provides the SpamBayes API; and CommentBayes, which is an add-on to
Django’s contrib.comments application and provides filtering and moderation
of comments through signals.